If you were using a hardened cups under the springs and installing your shims under the cup, does the shim have to be hardened? I am having to shim over .200 so I was curious if I could sandwich a 1/2" flat washer under the cup and maybe sandwiched between two hardened shims so spring_cup_hardened shim_flat washer_hardened shim_head.


'75 Plymouth Duster
Phase I 451 906/590/2-660 10.75/126
Phase II 451 Stage VI/590/1050 9.82/135
Phase III 383 906/Victor-Pump gas 11.30/119

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